Making sodium, potassium and ammonium salts
3 marks · NormalWrite the balanced chemical equation for the preparation of ammonium sulfate by titrating ammonia solution () with sulfuric acid ().
State the number of moles of ammonia needed to react with one mole of sulfuric acid and identify the formula for ammonium sulfate.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
2NH3(aq) + H2SO4(aq) 6 (NH4)2SO4(aq); 2 moles NH3; formula: (NH4)2SO4
Must show: Balanced equation, 2 moles NH3 for 1 mole H2SO4, (NH4)2SO4 formula
Common mistakes: Incorrect formula: NH4SO4 or NH4HSO4; Incorrect coefficients; 1:1 ratio error
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Gives the correct balanced equation: 2NH3(aq) + H2SO4(aq) -> (NH4)2SO4(aq)
B1 · 1 mark · States 2 moles of ammonia react with 1 mole of sulfuric acid.
B2 · 1 mark · Gives the correct formula: (NH4)2SO4.
Worked solution
From the equation, 2 moles of ammonia react with 1 mole of sulfuric acid to form ammonium sulfate.